Publications by authors named "Ehsan Nazemi"

Many different kind of fluids in a wide variety of industries exist, such as two-phase and three-phase. Various combinations of them can be expected and gas-oil-water is one of the most common flows. Measuring the volume fraction of phases without separation is vital in many aspects, one of which is financial issues.

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In addition to affecting people's bodily and mental health, the Covid-19 epidemic has also altered the emotional and mental well-being of many workers. Especially in the realm of institutions and privately held enterprises, which encountered a plethora of constraints due to the peculiar circumstances of the epidemic. It was thus anticipated that the present study would use a group method of data handling (GMDH) neural network for analyzing the relationship of demographic factors, Coronavirus, resilience, and the burnout in startups.

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The air kerma, which is the amount of energy given off by a radioactive substance, is essential for medical specialists who use radiation to diagnose cancer problems. The amount of energy that a photon has when it hits something can be described as the air kerma (the amount of energy that was deposited in the air when the photon passed through it). Radiation beam intensity is represented by this value.

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Article Synopsis
  • * Due to factors like the heel effect and varying X-ray tube voltages, air kerma levels can differ within the X-ray beam's field of view.
  • * An intelligent method using a radial basis function neural network was developed to predict air kerma distribution from limited measurements, validated through Monte Carlo simulations at various tube voltages (40-140 kV).
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Neuromorphic engineering is an essential science field which incorporates the basic aspects of issues together such as: physics, mathematics, electronics, etc. The primary block in the Central Nervous System (CNS) is neurons that have functional roles such as: receiving, processing, and transmitting data in the brain. This paper presents Wilson Multiplierless Neuron (WMN) model which is a modified version of the original model.

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Article Synopsis
  • The paper discusses the development of a new model for biological neural networks called N-LUT-ADEX, which uses a sampling method to convert continuous signals into discrete data.
  • This model achieves high accuracy in replicating the spiking patterns of the original Adaptive Exponential integrate-and-fire neuron model.
  • Implemented on a Virtex-II FPGA board, N-LUT-ADEX demonstrates low-cost and high-speed capabilities, making it a promising option for neuromorphic engineering applications.
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Measuring fluid characteristics is of high importance in various industries such as the polymer, petroleum, and petrochemical industries, etc. Flow regime classification and void fraction measurement are essential for predicting the performance of many systems. The efficiency of multiphase flow meters strongly depends on the flow parameters.

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In this paper, X-ray tube is introduced as a potential alternative for radioisotope sources used in radiation based liquid-gas two-phase flowmeters. X-ray tubes have lots of advantages over the radioisotope sources such as having an adjustable emitting photon's energy, being safer from point of view of radiation health physics during the transportation of the source, having ability to generate a high flux photon beam, and etc. The proposed radiation based system in this study composes an X-ray tube with a tube voltage of 150 kV and a 2.

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